From: A. Kretschmer <andreas.kretschmer@schollglas.com>
To: pgsql-sql@postgresql.org
Subject: Re: How can I know if a row is Locked?
Date: Fri, 13 Apr 2007 13:48:54 +0200
Message-ID: <20070413114854.GM24558@a-kretschmer.de> (raw)
In-Reply-To: <651844.97452.qm@web57110.mail.re3.yahoo.com>
References: <651844.97452.qm@web57110.mail.re3.yahoo.com>
am Fri, dem 13.04.2007, um 4:27:34 -0700 mailte Carlos Santos folgendes:
> How can I know if a row is locked by another transaction.
> I have in a transaction like that:
>
> BEGIN;
> SELECT * FROM compels.teste WHERE id = '1' FOR UPDATE;
>
> PS1: where id is the primary key.
> PS2: The COMMIT command is done after a long time.
>
> In this case the row with the primary-key equals to '1' will be locked to other
> transactions until the COMMIT command be executed.
> So, how can I detect if this row is locked?
You can call the insert with 'for update nowait' and catch the error, if
an error occurs.
Maybe there are better solutions...
Andreas
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Andreas Kretschmer
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To: pgsql-sql@postgresql.org
Cc: andreas.kretschmer@schollglas.com
Subject: Re: How can I know if a row is Locked?
In-Reply-To: <20070413114854.GM24558@a-kretschmer.de>
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